JP7276497B2 - METHOD, APPARATUS AND COMMUNICATION SYSTEM FOR RANDOM ACCESS RESPONSE - Google Patents

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method, device and communication system for receiving random access responses.

Random access procedure is a very important procedure in mobile communication technology.

FIG. 1(a) is a flow chart of a conventional 4-step Contention Based Random Access (CBRA) procedure. As shown in (a) of FIG. 1 , in step 101, the terminal device selects a CBRA preamble and transmits the preamble via Msg1 in a system preset Random Access Occasion (RO). in step 102, the network device sends Msg2 after receiving the preamble, and a Random Access Response (RAR) grants one dedicated uplink PUSCH resource to the terminal device sending the preamble; A temporary CRNTI may be allocated and an uplink advance of the PUSCH may be indicated; in step 103, the terminal device sends Msg3 to carry signaling or data on the PUSCH resource; and, in step 104, The network device sends contention resolution signaling Msg4 for Msg3 to the terminal device.

FIG. 1(b) is a flowchart of a conventional two-step Contention Based Random Access (CBRA) procedure. As shown in FIG. 1(b), in step 105, the terminal device transmits MsgA, MsgA includes a CBRA preamble and a data payload, and the terminal device sends MsgA in the contention RO. Send a preamble and also send MsgA signaling or service data on the contended Physical Uplink Shared Channel (PUSCH) resource. Then, in step 106, the network device sends MsgB after receiving MsgA, thereby sending a random access response and contention resolution message to the terminal device.

It should be noted that the above introduction of the background art is to clearly and completely describe the technical solution of the present invention and facilitate the understanding of those skilled in the art. These technical proposals are described in the background art of the present invention and should not be construed as being well known to those skilled in the art.

The inventors of the present invention have discovered the following. That is, the terminal device may receive the MsgB transmitted by the base station or the random access response of the 4-step random access procedure after transmitting the preamble of the 2-step random access procedure. The physical downlink control channel (PDCCH) scheduling random access response in MsgB or 4-step random access procedure is addressed to a random access radio network temporary indicator (RA-RNTI), but a different physical random access channel (PRACH) RO The possibility of calculating the same RA-RNTI based on time-frequency resource location may lead to confusion of random access responses for different PRACH ROs.

For example, for a 4-step random access procedure, one RA-RNTI may be calculated based on the first PRACH RO, and for a 2-step random access procedure, the same RA-RNTI may be calculated based on the second PRACH RO. It is possible to calculate Therefore, when monitoring the PDCCH based on the RA-RNTI, it is easy to mix the random access response of the 4-step random access procedure and the random access response of the 2-step random access procedure.

To solve the above technical problems, embodiments of the present invention provide a random access response receiving method, device and communication system. In the random access response receiving method of this embodiment, the terminal device schedules the first random access response (that is, MsgB) in the two-step random access procedure for the network device transmission in the first random access response receiving time window. Since the downlink control channel (PDCCH) can be monitored, confusion of random access responses for different PRACH ROs can be avoided.

According to a first aspect of an embodiment of the present invention, there is provided a random access response receiving device applied to a terminal device, the device comprising:
A first transmission unit for transmitting a first message (MsgA) of a two-step random access procedure to a network device, the first message (MsgA) including a preamble and physical uplink shared channel (PUSCH) data. , a first transmission unit; and monitoring a physical downlink control channel (PDCCH) for scheduling a first random access response (MsgB) in a two-step random access procedure of said network device transmission in a first random access response reception time window. A first monitoring unit, wherein the first random access response MsgB includes at least a C-RNTI to allocate for the terminal and a contention resolution message.

According to a second aspect of an embodiment of the present invention, there is provided a random access response transmission device applied to a network device, the device comprising:
a second sending unit for sending an indication message for indicating a length of a first random access response receiving time window to a terminal device, wherein the first random access response receiving time window is determined by the terminal device for two-step random access; Used to monitor the physical downlink control channel (PDCCH) scheduling the first random access response in the procedure, the first random access response MsgB is at least the C-RNTI allocated for the terminal device and a contention resolution message and a second transmitting unit.

According to a third aspect of an embodiment of the present invention, there is provided a communication system comprising a terminal device and a network device, the terminal device comprising a random access response receiving device according to the first aspect of the embodiment as described above. wherein the network device comprises the random access response transmitting device according to the second aspect of the embodiment as described above.

Advantageous effects of embodiments of the present invention are as follows. That is, since the terminal equipment can monitor the physical downlink control channel (PDCCH) of MsgB only in a specific time window, confusion of random access responses for different PRACH ROs can be avoided.

Reference to the following description and drawings sets forth in detail certain embodiments of the invention and illustrates the manner in which the principles of the invention may be employed. However, embodiments of the present invention are not limited in scope by these. Within the scope of the appended claims, the embodiments of the invention may include various alterations, modifications and substitutions.

Also, features described and/or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or in other embodiments. You can also replace features in

It should be noted that terms such as "including/having," as used herein, refer to the presence of a feature, element, step, or assembly, but not one or more other features, elements, steps, or does not exclude the presence or addition of assemblies.

Elements and features depicted in one drawing or embodiment of the invention may be combined with elements and features depicted in one or more other drawings or embodiments. Also, in the drawings, similar symbols are used to indicate corresponding parts in several drawings and to indicate corresponding parts used in multiple embodiments.

The included drawings are included to provide a further understanding of the embodiments of the invention, and these drawings, which form a part of this specification, illustrate embodiments of the invention, and illustrate embodiments of the invention. It is used to explain the principles of the invention together with the description. Also, it should be appreciated that the drawings, described below, are only intended to illustrate some embodiments of the present invention, and a person skilled in the art will be able to base these drawings without creative efforts. You can also get other drawings by
(a) is a flow chart of a conventional 4-step contention-based random access procedure; (b) is a flow chart of a conventional 2-step contention-based random access procedure; 1 is a diagram showing a communication system of the present invention; FIG. It is a figure which shows the receiving method of the random access response in Example 1 of this invention. FIG. 10 is a diagram showing another method of receiving a random access response in embodiment 2 of the present invention; FIG. 10 is a diagram showing a method of transmitting a random access response in Example 3 of the present invention; FIG. 10 is a diagram showing a receiving device for random access responses in Example 4 of the present invention; FIG. 10 is a diagram showing a random access response transmitting apparatus according to Embodiment 5 of the present invention; FIG. 12 is a configuration diagram of a terminal device in Example 6 of the present invention; FIG. 12 is a configuration diagram of a network device in Example 7 of the present invention;

The foregoing and other features of the present invention will become apparent with reference to the accompanying drawings and the following description. While the specification and drawings disclose specific embodiments of the invention, it is to be understood that they illustrate only some of the embodiments that may employ the principles of the invention and that the invention may be practiced as described. The invention is not limited to the embodiments shown, i.e. the invention includes all modifications, variations and alternatives that fall within the scope of the appended claims.

In embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as LTE (Long Term Evolution), LTE- A (LTE-Advanced), WCDMA (registered trademark) (Wideband Code Division Multiple Access), HSPA (High-Speed Packet Access), and the like.

In addition, communication between devices in the communication system may be performed according to any stage of communication protocol, and may include, but is not limited to, the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR), etc. and/or other conventional or future developed communication protocols.

In an embodiment of the present invention, the term "network equipment" refers to equipment, for example in a communication system, that connects terminal equipment to the communication network and provides services to the terminal equipment. Network equipment may include, but is not limited to: Base Station (BS), Access Point (AP), Transmission Reception Point (TRP), Broadcast Transmitter, Mobile Management Entity (MME), Network Gateway, Server, Radio Network Controller (RNC), Base Station Controller (BSC), etc.

Among them, the base station may include, but is not limited to, Node B (NodeB or NB), evolved Node B (eNodeB or eNB) and 5G base station (gNB), etc. , and may further include RRH (Remote Radio Head), RRU (Remote Radio Unit), relays, or low power nodes (eg, femto, pico, etc.). Also, the term "base station" may include some or all of these functions, each base station being capable of providing communication coverage for a particular geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context of the term.

In an embodiment of the present invention, the terms "User Equipment" (UE, User Equipment) or "Terminal Equipment" (TE, Terminal Equipment) refer to equipment that accesses a telecommunications network and receives services from the network, e.g. point to User Equipment may be fixed or mobile and may also be Mobile Station (MS), Terminal, Subscriber Station (SS), Access Terminal (AT), Station etc. is also called.

User equipment may include, but is not limited to, cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, carrying devices, machine types These include communication devices, laptop computers, cordless phones, smart phones, smart watches, and digital cameras.

Also, for example, in scenarios such as IoT (Internet of Things), the user device may be a device or device that performs monitoring or measurement, and may include, but is not limited to, the following: Machine Type Communication (MTC) terminals, in-vehicle communication terminals, D2D (Device to Device) terminals, M2M (Machine to Machine) terminals, and the like.

The following examples describe scenarios according to embodiments of the present invention, but the present invention is not limited thereto.

FIG. 2 is a diagram showing a communication system according to the present invention, and explains a case where a terminal device and a network device are taken as examples. As shown in FIG. 2, communication system 200 may include network equipment 201 and terminal equipment 202 . For convenience, only one terminal device 202 will be described in FIG. 2 as an example, but the present invention is not limited to this.

Embodiments of the present invention can carry conventional traffic (business) or future-implemented services between the network device 201 and the terminal device 202 . These traffics may include, but are not limited to, eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communication), URLLC (Ultra-Reliable and Low-Latency Communication), and the like.

Among them, the terminal device 202 can transmit data to the network device 201, for example, using a grant-free transmission method. Terminal device 202 can also receive data sent by network device 201 and feed back information to network device 201, such as acknowledged ACK/non-acknowledged NACK information. Network device 201 can confirm the end of the transmission process, transmission of new data, or retransmission of data based on the feedback information.

Also, before the terminal device 202 accesses the network device 201 , the network device 201 can send information regarding system information to the terminal device 202 . By detecting the received information, the terminal device 202 can achieve downlink synchronization and establish a connection with the network device 201 .

In the following description, it is assumed that a network device in a communication system is a transmitting end and a terminal device is a receiving end. It can be. For example, the present invention can be applied not only to signal transmission between a network device and a terminal device, but also to signal transmission between two terminal devices.

Embodiment 1 of the present invention provides a method for receiving a random access response, which can be performed by a terminal device.

FIG. 3 is a diagram showing a method of receiving a random access response according to this embodiment. As shown in FIG. 3, the method includes the following steps.

Step 301: The terminal device sends a first message (MsgA) of the two-step random access procedure to the network device, wherein the first message (MsgA) contains preamble and physical uplink shared channel (PUSCH) data. include;
Step 302: a terminal device monitors a physical downlink control channel (PDCCH) for scheduling a first random access response (MsgB) in a two-step random access procedure, transmitted by the network device, in a first random access response reception time window; Wherein, the first random access response (MsgB) includes at least a cell radio network temporary indicator (C-RNTI) allocated for the terminal and a contention resolution message.

This embodiment allows the terminal device to monitor the physical downlink control channel (PDCCH) for scheduling the first random access response (i.e., MsgB) in the two-step random access procedure for network device transmission in a specific time window, Confusion of random access responses for different PRACH ROs can be avoided.

In one implementation, the first random access response MsgB can be received in its entirety. wherein the physical downlink control channel (PDCCH) for scheduling the first random access response can be scrambled with a first random access radio network temporary indicator (RA-RNTI), and the first random access response reception time window The length is the calculation window length of the first random access radio network temporary indicator (RA-RNTI) for scrambling described above (where "calculation window length" refers to "calculation time window length"; hereinafter , and the same.) It is the following.

In one example of the implementation scheme, as depicted in FIG. 3, the method may further include the following steps.

Step 303: the terminal monitors the physical downlink control channel (PDCCH) for scheduling the second random access response (Msg2) of the network device transmission in the first random access response receiving time window, wherein the first The second random access response Msg2 contains at least a Temporary Cell Radio Network Temporary Indicator (TC-RNTI) allocated for the terminal and an uplink resource grant for the terminal to send Msg3 of the four-step random access procedure.

In this example, the physical downlink control channel (PDCCH) scheduling the second random access response Msg2 can be scrambled with a second random access radio network temporary indicator (RA-RNTI), the first RA-RNTI and the second Two RA-RNTIs may be the same or different. The calculation window length of the second RA-RNTI may be less than or equal to the calculation window length of the first RA-RNTI.

In this example, the length of the first random access response reception time window may be less than or equal to the calculated window length of the second RA-RNTI for scrambling described above.

In this example, the start time of the first random access response reception time window may be any of the following times.

1a, a predetermined time after the terminal device sends the preamble of the first message (MsgA) in the two-step random access procedure, such as the first time after sending the preamble of the first message (MsgA); is a symbol of;
2a, at a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message (MsgA) in the two-step random access procedure, e.g., the first symbol after transmitting the PUSCH of MsgA; can be;
3a, the first PDCCH opportunity (PDCCH) to schedule the first random access response (MsgB) or the second random access response (Msg2) after transmitting the preamble of the first message (MsgA) Occasion), e.g., the first PDCCH opportunity after transmitting the preamble of the first message (MsgA), which may schedule the first random access response (MsgB), and the first, the second is a relatively early PDCCH opportunity among PDCCH opportunities on which a random access response (Msg2) may be scheduled; or
4a, schedule the first random access response (MsgB) or the second random access response (Msg2) after transmitting the physical uplink shared channel (PUSCH) data of the first message (MsgA); PDCCH opportunity to obtain (PDCCH occasion), for example, the first PDCCH opportunity to schedule the first random access response (MsgB) after transmitting the PUSCH data of the first message (MsgA), and the first, It is the PDCCH opportunity that appears relatively early among the PDCCH opportunities that can schedule the second random access response (Msg2).

In this example, the terminal device can start a first timer at the start time of the first random access response reception time window.

In this example, within the first random access response reception time window, e.g., within the period in which the first timer is running, the terminal device receives the PDCCH signal based on the first RA-RNTI and the second RA-RNTI, respectively. in which the terminal equipment has received the PDCCH scrambled by the first RA-RNTI, and one medium access control layer subprotocol data unit (MAC subPDU) in the transport block (TB) of the PDCCH indication contains a preamble indicator and MsgB that match the 2-step RACH preamble to be sent, the terminal device determines that it has received the first random access response MsgB; A preamble indicator that matches the two-step RACH preamble that has received a scrambled PDCCH and is sent in one medium access control layer subprotocol data unit (MAC subPDU) in the transport block (TB) of the PDCCH indication and If Msg2 is included, the terminal device determines that it has received the second random access response Msg2.

In this example, the terminal device receives the first random access response (MsgB) or the second random access response (Msg2) within a first random access response reception time window (for example, the period in which the first timer is running). is received, it is considered that the random access response has been successfully received, so the physical downlink control channel (PDCCH) of the first random access response (MsgB) and the physical downlink control of the second random access response (Msg2) Channel (PDCCH) monitoring can be stopped.

Further, when the terminal device receives the first random access response (MsgB) or the second random access response (Msg2) within the first random access response reception time window, the terminal device further receives the first random access response reception time The window may be terminated, eg, stopping the first timer.

In addition, if MsgB or Msg2 is not received in the first random access response reception time window, for example, if MsgB or Msg2 is still not received until the first timer expires, the terminal device determines that the random access response reception has failed. can judge. When the running time of the first timer reaches the length of the first random access response receiving time window, it is determined that the first timer expires.

In another example of the implementation scheme, as shown in FIG. 3, the method may further include the following steps.

Step 304: After sending the first message MsgA of the two-step random access procedure to the network device, the terminal device schedules a second random access response (Msg2) for the network device transmission in a second random access response receiving time window. monitor the physical downlink control channel (PDCCH).

In this example, at least one of the start time and end time of the second random access response reception time window is different from the first random access response reception time window.

Among them, for the first random access response reception time window, the time length between its end time and its start time is the window length of the first random access response reception time window, and the second random access response reception time window. , the length of time between its end time and its start time is the window length of the second random access response reception time window.

In this embodiment, timers may be respectively set for the first random access response reception time window and the second random access response reception time window, such as the first timer for the first random access response reception time window. and set a second timer for the second random access response reception time window.

The difference between step 304 and step 303 is that step 303 monitors the PDCCH scheduling MsgB and the PDCCH scheduling Msg2 within the first random access response reception time window, whereas step 304 monitors the first random access response independent of each other. To monitor the PDCCH scheduling MsgB and the PDCCH scheduling Msg2 within the reception time window and the second random access response reception time window, respectively.

For step 304, the start time of the first random access response reception time window may be any one of the following times.

1b, a predetermined time after the terminal device sends the preamble of the first message (MsgA) in the two-step random access procedure, such as the first time after sending the preamble of the first message (MsgA); is a symbol of;
2b, at a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message (MsgA) in the two-step random access procedure, e.g., the first symbol after transmitting the PUSCH of MsgA; can be;
3b, the first PDCCH occasion upon which the first random access response (MsgB) can be scheduled after transmitting the preamble of the first message (MsgA); and 4b, the first It is the first PDCCH occasion for scheduling the first random access response (MsgB) after transmitting one message (MsgA) physical uplink shared channel (PUSCH) data.

The start time of the second random access response reception time window may be any one of the following times.

1c, a predetermined time after the terminal device sends the preamble of the first message (MsgA) in the two-step random access procedure, such as the first time after sending the preamble of the first message (MsgA); is a symbol of;
2c, a predetermined time when the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message (MsgA) in the two-step random access procedure, for example, the first symbol after transmitting the PUSCH of MsgA. ;
3c, the first PDCCH opportunity to schedule the second random access response (Msg2) that transmitted the preamble of the first message (MsgA); and 4c, the first message. (MsgA) is the first PDCCH opportunity for scheduling the second random access response (Msg2) after transmitting the physical uplink shared channel (PUSCH) data (MsgA).

Also, in this example, the physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 can be scrambled with a second random access radio network temporary indicator (RA-RNTI), the first RA-RNTI and the second RA-RNTI may be the same or different. The calculation window length of the second RA-RNTI may be less than or equal to the calculation window length of the first RA-RNTI.

In this example, the length of the first random access response reception time window may be less than or equal to the calculated window length of the second RA-RNTI for scrambling described above.

In this example, within the first random access response reception time window, for example, within the period when the first timer is running, the terminal monitors the PDCCH based on the first RA-RNTI, wherein the terminal 2. A device has received the PDCCH scrambled by the first RA-RNTI and is sent one medium access control layer subprotocol data unit (MAC subPDU) in the transport block (TB) of the PDCCH indication. If the preamble indicator and MsgB matching the RACH preamble are included, the terminal device determines that it has received the first random access response MsgB.

In this example, within the second random access response reception time window, for example, within the period when the second timer is running, the terminal monitors the PDCCH based on the second RA-RNTI, wherein the terminal 2. A device has received a PDCCH scrambled by a second RA-RNTI and is sent one Medium Access Control layer subprotocol data unit (MAC subPDU) in a transport block (TB) of the PDCCH indication. If the preamble indicator and Msg2 that match the RACH preamble are included, the terminal device determines that it has received the second random access response Msg2.

In this example, when the second random access response Msg2 is received within the second random access response reception time window (for example, the period in which the second timer is running), the physical downlink control channel of the second random access response Msg2 (PDCCH) and may stop monitoring the physical downlink control channel (PDCCH) of the first random access response MsgB, and the physical downlink control channel (PDCCH) of the first random access response MsgB is not started, it is not necessary to start monitoring the physical downlink control channel (PDCCH) for the first random access response MsgB.

In addition, if the second random access response Msg2 is received within the second random access response receiving time window, the terminal device may further terminate the second random access response receiving time window, for example, stop the second timer. and terminate the first random access response reception time window, eg, stop the first timer. Moreover, when the first timer has not been started, the first timer does not have to be started.

In this example, when the first random access response MsgB is received within the first random access response reception time window (for example, the period in which the first timer is running), the physical downlink control channel of the first random access response MsgB (PDCCH) monitoring may be stopped, and monitoring of the physical downlink control channel (PDCCH) of the second random access response Msg2 may be stopped, and the physical downlink control channel (PDCCH) of the second random access response Msg2 If monitoring has not started, it is not necessary to start monitoring the physical downlink control channel (PDCCH) for the second random access response Msg2.

In addition, when receiving the first random access response MsgB within the first random access response receiving time window, the terminal device may further terminate the first random access response receiving time window, for example, stop the first timer. and terminate the second random access response reception time window, eg, stop a second timer. Moreover, when the second timer is not started, the second timer does not have to be started.

MsgB is not received within the first random access response reception time window, e.g., MsgB is still not received until the first timer expires and Msg2 is not received within the second random access response reception time window; For example, if Msg2 is still not received until the second timer expires, the terminal device may determine that the random access response has failed to be received.

This embodiment allows the terminal device to monitor the physical downlink control channel (PDCCH) for scheduling the first random access response (i.e., MsgB) in the two-step random access procedure for network device transmission in a specific time window, Confusion of random access responses for different PRACH ROs can be avoided.

Embodiment 2 of the present invention provides a method for receiving a random access response, which can be performed by a terminal device.

The random access response receiving method of the second embodiment is similar to the random access response receiving method of the first embodiment, except that in the first embodiment the first random access response MsgB is received as a whole, In embodiment 2, the first random access response MsgB has two parts, and correspondingly the first random access response reception time window also has two parts.

The second embodiment will be described in detail below.

FIG. 4 is a diagram showing another method of receiving a random access response according to the second embodiment.

As shown in FIG. 4, the method includes steps 301 and 302 . Embodiment 1 can be referred to for the description of steps 301 and 302 .

In this embodiment, the first part of the first random access response MsgB contains at least the C-RNTI allocated for the terminal device, and the second part of the first random access response MsgB contains at least the contention resolution message.

In this embodiment, the PDCCH scheduling the first part of the first random access response MsgB can be scrambled by the first RA-RNTI and the PDCCH scheduling the second part of the first random access response MsgB can be scrambled by the C-RNTI. Can be scrambled.

In this embodiment, the first random access response reception time window includes a first sub-time window and a second sub-time window. The terminal monitors the physical downlink control channel (PDCCH) scheduling the first part of the first random access response MsgB in the first sub-time window. Also, the terminal monitors the physical downlink control channel (PDCCH) that schedules the second part of the first random access response MsgB in the second sub-time window.

In this embodiment, the length of the first sub-time window may be less than or equal to the calculation window length of the first RA-RNTI for scrambling the first part of magB.

As shown in FIG. 4, the method may further include the following steps.

Step 403: The terminal monitors the physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 in the first sub-time window.

Wherein, the second random access response Msg2 includes at least a TC-RNTI allocated for the terminal equipment and an uplink resource grant for the terminal equipment to transmit Msg3 of the 4-step random access procedure.

In this example, the physical downlink control channel (PDCCH) scheduling the second random access response Msg2 can be scrambled with a second random access radio network temporary indicator (RA-RNTI), the first RA-RNTI and the The second RA-RNTI may be the same or different. The calculation window length of the second RA-RNTI may be less than or equal to the calculation window length of the first RA-RNTI.

In this example, the length of the second sub-time window may be less than or equal to the calculated window length of the second RA-RNTI for scrambling described above.

In this example, the start time of the first random access response reception time window may be any one of the following times.

1d, a predetermined time after the terminal device sends the preamble of the first message (MsgA) in the two-step random access procedure, such as the first after sending the preamble of the first message (MsgA) is a symbol of;
2d, at a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message (MsgA) in the two-step random access procedure, e.g., the first symbol after transmitting the PUSCH of MsgA; can be;
3d, the first PDCCH that can schedule the first part of the first random access response (MsgB) or the second random access response (Msg2) after transmitting the preamble of the first message (MsgA) a PDCCH occasion, e.g., the first PDCCH opportunity to schedule the first part of the first random access response (MsgB) after transmitting the preamble of the first message (MsgA), and 1 4d, the physical uplink shared channel (PUSCH) of the first message (MsgA), which is a relatively early PDCCH opportunity among the PDCCH opportunities that can schedule the second random access response (Msg2); or The first PDCCH occasion after transmitting data, which may schedule the first part of the first random access response (MsgB) or the second random access response (Msg2), e.g., the first message ( MsgA), the first PDCCH opportunity to schedule the first part of the first random access response (MsgB), and the first to schedule the second random access response (Msg2). It is the PDCCH opportunity that appeared relatively early among the obtained PDCCH opportunities.

In this example, the terminal device may start a third timer at the start time of the first sub-time window of the first random access response reception time window.

In this embodiment, the start time of the second sub-time window may include a predetermined time after the terminal receives the first part within the first sub-time window. For example, the start time of the second sub-time window may be the first symbol after the terminal receives the first part of MsgB.

In this example, the terminal device may start a fourth timer at the start time of the second sub-time window of the first random access response reception time window.

In this example, within the first sub-time window, e.g., within the period in which the third timer is running, the terminal monitors the PDCCH based on the first RA-RNTI and the second RA-RNTI, respectively. , if the terminal device receives the first part of the first random access response (MsgB) or the second random access response (Msg2) within the first sub-time window, the first part of the first random access response (MsgB) Monitoring of a portion of the physical downlink control channel (PDCCH) and the physical downlink control channel (PDCCH) of the second random access response (Msg2) can be stopped.

Further, when the terminal receives the first part of the first random access response (MsgB) or the second random access response (Msg2) within the first sub-time window, the terminal further terminates the first sub-time window. can, for example, stop the third timer.

When starting the second sub-time window, the terminal can monitor the second part of MsgB within the second sub-time window, e.g. Monitor the scrambled PDCCH and stop monitoring the second part of MsgB if the second part of MsgB is received within the second sub-time window (e.g., the period during which the fourth timer is running). and the terminal device can also terminate the second sub-time window, eg, stop the fourth timer.

In this embodiment, if neither the first part of MsgB nor Msg2 is received within the first sub-time window, e.g. It can be determined that reception of the response has failed. When the running time of the third timer reaches the length of the first sub-time window, it is determined that the third timer expires.

In this embodiment, if the second part of MsgB is not received within the second sub-time window, e.g., if the second part of MsgB is still not received until the fourth timer expires, the terminal device will send a random access response. It can be determined that reception has failed. When the running time of the fourth timer reaches the length of the second sub-time window, it is determined that the fourth timer expires.

In another example of the implementation scheme, as depicted in FIG. 4, the method may further include the following steps.

Step 404: After sending the first message MsgA of the two-step random access procedure to the network device, the terminal device schedules a second random access response (Msg2) for the network device to send within the second random access response receiving time window. monitor the physical downlink control channel (PDCCH).

In this example, at least one of the start time and end time of the second random access response reception time window is different from the first sub-time window.

Among them, for the first sub-time window, the time length between its end time and its start time is the window length of the first sub-time window, and for the second random access response reception time window, The length of time between its end time and its start time is the window length of the second random access response reception time window.

In this embodiment, timers can be set for the first sub-time window and the second random access response reception time window, respectively, for example, a third timer is set for the first sub-time window, and a second timer is set for the second sub-time window. Set a second timer for the random access response reception time window.

The difference between step 404 and step 403 is that step 403 monitors the PDCCH scheduling the first part of MsgB and the PDCCH scheduling Msg2 within the first sub-time window, whereas step 404 monitors the first sub-time windows independent of each other. and monitoring the PDCCH scheduling the first part of MsgB and the PDCCH scheduling Msg2 respectively within the second random access response reception time window.

For step 404, the start time of the first sub-time window may be any one of the following times.

1e, a predetermined time when the terminal device transmits the preamble of the first message (MsgA) in the two-step random access procedure, such as the first symbol after transmitting the preamble of the first message (MsgA); is;
2e, at a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message (MsgA) in the two-step random access procedure, e.g., the first symbol after transmitting the PUSCH of MsgA; can be;
3e, the first PDCCH occasion upon which the first random access response (MsgB) can be scheduled after transmitting the preamble of the first message (MsgA); and 4e, the first It is the first PDCCH occasion for scheduling the first random access response (MsgB) after transmitting one message (MsgA) physical uplink shared channel (PUSCH) data.

The start time of the second random access response reception time window may be any one of the following times.

1f, a predetermined time after the terminal device sends the preamble of the first message (MsgA) in the two-step random access procedure, such as the first time after sending the preamble of the first message (MsgA); is a symbol of;
2f, at a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message (MsgA) in the two-step random access procedure, e.g., the first symbol after transmitting the PUSCH of MsgA; can be;
3f, the first PDCCH occasion upon which the second random access response (Msg2) can be scheduled after transmitting the preamble of the first message (MsgA); and 4f, the first It is the first PDCCH occasion where the second random access response (Msg2) can be scheduled after transmitting the physical uplink shared channel (PUSCH) data of one message (MsgA).

Also, in this example, the physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 can be scrambled with a second random access radio network temporary indicator (RA-RNTI), the first RA-RNTI and the second RA-RNTI may be the same or different. The calculation window length of the second RA-RNTI may be less than or equal to the calculation window length of the first RA-RNTI.

In this example, the length of the first sub-time window may be less than or equal to the calculated window length of the second RA-RNTI for scrambling described above.

In this embodiment, the start time of the second sub-time window may include a predetermined time after the terminal receives the first part within the first sub-time window. For example, the start time of the second sub-time window may be the first symbol after the terminal receives the first part of MsgB.

In this example, within the first sub-time window, e.g., within the period in which the third timer is running, the terminal equipment monitors the PDCCH based on the first RA-RNTI, so that the first part of MsgB can be received.

In this example, within the second random access response reception time window, e.g., within the period in which the second timer is running, the terminal device receives Msg2 by monitoring the PDCCH based on the second RA-RNTI. can receive.

In this example, when the second random access response Msg2 is received within the second random access response reception time window (for example, the period in which the second timer is running), the physical downlink control channel of the second random access response Msg2 (PDCCH) can be stopped monitoring, and the physical downlink control channel (PDCCH) monitoring of the first part of the first random access response MsgB can be stopped, and the first part of the first random access response MsgB If monitoring of the physical downlink control channel (PDCCH) has not been started, monitoring of the physical downlink control channel (PDCCH) of the first part of the first random access response MsgB may not be started.

In addition, if the second random access response Msg2 is received within the second random access response reception time window, the terminal device may further terminate the second random access response reception time window, for example, stop the second timer. , and the first sub-time window can be terminated, eg, the third timer is stopped. Moreover, when the third timer is not started, the third timer does not have to be started.

In this example, if the first part of the first random access response MsgB is received within the first sub-time window (e.g., the period in which the third timer is running), the first part of the first random access response MsgB is physically It is possible to stop monitoring the downlink control channel (PDCCH) and stop monitoring the physical downlink control channel (PDCCH) of the second random access response Msg2, and the physical downlink control channel (PDCCH) of the second random access response Msg2 ( PDCCH), it is not necessary to start monitoring the physical downlink control channel (PDCCH) for the second random access response Msg2.

Also, upon receiving the first part of the first random access response MsgB within the first sub-time window, the terminal device may further terminate the first sub-time window, for example, stop the third timer, and A second random access response reception time window may expire, eg, stop a second timer. Moreover, when the second timer is not started, the second timer does not have to be started.

If the terminal receives the first part of the first random access response MsgB within the first sub-time window, the terminal can also start the second sub-time window. When starting the second sub-time window, the terminal can monitor the second part of MsgB within the second sub-time window, e.g., by C-RNTI within the period when the fourth timer is running Monitor the scrambled PDCCH and stop monitoring the second part of MsgB if the second part of MsgB is received within the second sub-time window (e.g., the period during which the fourth timer is running). and the terminal device can further stop the fourth timer.

In this embodiment, within the first sub-time window, the first part of MsgB is not received and within the second random access response reception time window neither Msg2 is received, e.g. is not received and Msg2 is still not received until the second timer expires, the terminal may determine that the random access response has failed to be received. wherein, when the running time of the third timer reaches the length of the first sub-time window, it is determined that the third timer expires, and the running time of the second timer is the length of the second random access response receiving time window; is reached, the second timer is determined to expire.

In this embodiment, if the second part of MsgB is not received within the second sub-time window, e.g., if the second part of MsgB is still not received until the fourth timer expires, the terminal device will send a random access response. It can be determined that reception has failed. When the running time of the fourth timer reaches the length of the second sub-time window, it is determined that the fourth timer expires.

This embodiment allows the terminal device to monitor the physical downlink control channel (PDCCH) for scheduling the first random access response (i.e., MsgB) in the two-step random access procedure for network device transmission in a specific time window, Confusion of random access responses for different PRACH ROs can be avoided.

This embodiment 3 provides a method for sending a random access response, which can be applied to a network device.

FIG. 5 is a diagram showing a method of transmitting a random access response according to the third embodiment.

As shown in FIG. 5, the method includes the following steps.

Step 501: The network device sends an indication message for indicating the length of the first random access response receiving time window to the terminal device.

Wherein the first random access response reception time window is used for monitoring a physical downlink control channel (PDCCH) for the terminal equipment to schedule the first random access response MsgB in a two-step random access procedure, wherein the The first random access response MsgB includes at least a C-RNTI allocated for the terminal and a contention resolution message.

The indication message may indicate the length of the first random access response reception time window.

In this embodiment, the physical downlink control channel (PDCCH) for scheduling the first random access response is scrambled with a random access radio network temporary indicator (RA-RNTI), and the length of the first random access response reception time window is is less than or equal to the calculated window length of the Random Access Radio Network Temporary Indicator (RA-RNTI).

In this embodiment, the first random access response reception time window is further used by the terminal device to monitor a second random access response Msg2, wherein the second random access response Msg2 is at least and an uplink resource grant for the terminal device to send Msg3 of the 4-step random access procedure.

In this embodiment, the physical downlink control channel (PDCCH) for scheduling the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI) and the physical for scheduling the second random access response Msg2. A downlink control channel (PDCCH) is scrambled with a secondary random access radio network temporary indicator (RA-RNTI). The length of the first random access response reception time window is less than or equal to the calculated window length of the first RA-RNTI and the calculated window length of the second RA-RNTI.

As shown in FIG. 5, the method further includes the following steps.

Step 502: The network device sends an indication message for indicating the length of the second random access response receiving time window to the terminal device.

Wherein, the second random access response reception time window is used for monitoring the physical downlink control channel (PDCCH) for the terminal equipment to schedule the second random access response Msg2, wherein the second random access response Msg2 is at least , a TC-RNTI to allocate for the terminal, and an uplink resource grant for the terminal to send Msg3 of the 4-step random access procedure.

In this embodiment, at least one of the start time and end time of the second random access response reception time window is different from the first random access response reception time window.

Among them, the physical downlink control channel (PDCCH) for scheduling the first random access response MsgB is scrambled with the first random access radio network temporary indicator (RA-RNTI), and the physical downlink control channel for scheduling the second random access response Msg2. (PDCCH) is scrambled with a secondary random access radio network temporary indicator (RA-RNTI).

The length of the first random access response reception time window is less than or equal to the calculated window length of the first RA-RNTI, and the length of the second random access response reception time window is less than or equal to the calculated window length of the second RA-RNTI. be.

Also, the first RA-RNTI and the second RA-RNTI may be the same or different.

In this embodiment, the first random access response receiving time window includes a first sub-time window and a second sub-time window, wherein the first sub-time window is the first sub-time window for the terminal device to receive the first random access response MsgB. Used to monitor a physical downlink control channel (PDCCH) for scheduling a part, the second sub-time window is a physical downlink control channel (PDCCH) for the terminal equipment to schedule the second part of the first random access response MsgB ) is used to monitor

In this embodiment, the first part includes at least a C-RNTI allocated for the terminal device, and the second part includes at least a contention resolution message. The indication message in step 501 can indicate the length of the first sub-time window and/or the length of the second sub-time window of the first random access response reception time window.

In this embodiment, the first sub-time window is also used to monitor the physical downlink control channel (PDCCH) for the terminal equipment to schedule the second random access response Msg2, wherein the second random access response Msg2 is at least , a TC-RNTI to allocate for the terminal, and an uplink resource grant for the terminal to send Msg3 of the 4-step random access procedure.

In one implementation of this embodiment, the physical downlink control channel (PDCCH) for scheduling the first part of the first random access response MsgB can be scrambled with a first random access radio network temporary indicator (RA-RNTI), The physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI) to schedule the second part of the first random access response MsgB. A downlink control channel (PDCCH) is scrambled by C-RNTI. Wherein, the length of the first sub-time window is less than or equal to the calculation window length of the first RA-RNTI, and the length of the first sub-time window is less than or equal to the calculation window length of the second RA-RNTI.

According to this embodiment, the network device sends a network message to the terminal device, causing the terminal device to send the first random access response (that is, MsgB) in the two-step random access procedure of the network device transmission within a specific time window. Since the scheduling physical downlink control channel (PDCCH) can be monitored, confusion of random access responses for different PRACH ROs can be avoided.

The fourth embodiment provides a random access response receiving device, which corresponds to the random access response receiving method of the first and second embodiments. The principle that the device solves the problem is similar to the methods in Examples 1 and 2, so its specific implementation can refer to the implementation of the methods in Examples 1 and 2, where the content is the same. Duplicate explanations are omitted.
FIG. 6 is a diagram showing a receiving device for random access responses in the fourth embodiment.

As shown in FIG. 6, the random access response receiving device 600 includes a first sending unit 601 and a first monitoring unit 602 .

wherein the first sending unit 601 sends a first message (MsgA) of the two-step random access procedure to the network device, wherein the first message (MsgA) consists of a preamble and a physical uplink shared channel (PUSCH); A physical downlink control channel (PDCCH) containing data, wherein the first monitoring unit 602 schedules a first random access response (MsgB) in a two-step random access procedure for said network device transmission in a first random access response reception time window. , wherein the first random access response MsgB includes at least a C-RNTI allocated for the terminal and a contention resolution message.

In this embodiment, the random access response receiving device 600 is installed in the terminal device. For the description of the device 600, the description of the operation of the terminal device in the first and second embodiments can be referred to.

The fifth embodiment provides a random access response transmission device, which corresponds to the random access response transmission method of the third embodiment. The principle that the device solves the problem is similar to the method of Embodiment 3, so its specific implementation can refer to the implementation of the method of Embodiment 3, and duplicate descriptions with the same content are omitted here. is done.
FIG. 7 is a diagram showing a random access response transmitting apparatus according to the fifth embodiment.

As shown in FIG. 7 , the random access response sending device 700 includes a second sending unit 701 .

In this embodiment, the second sending unit 701 sends an indication message for indicating the length of the first random access response receiving time window to the terminal device.

Wherein, the first random access response reception time window is used to monitor the physical downlink control channel (PDCCH) for the terminal equipment to schedule the first random access response in the two-step random access procedure, wherein the first The random access response MsgB includes at least a C-RNTI allocated for the terminal and a contention resolution message.

In this embodiment, the random access response transmitting device 700 is installed in a network device. For the description of the device 700, the description of the operation of the network device in the third embodiment can be referred to.

This embodiment 6 provides a terminal device, the principle of which the device solves the problem is similar to the device of embodiment 4, so the implementation of embodiment 4 can be referred to for its specific implementation. , duplicate descriptions with the same contents are omitted here.

FIG. 8 is a configuration diagram of a terminal device in an embodiment of the present invention. As shown in FIG. 8, terminal device 800 may include central processor (CPU) 801 and memory 802 , memory 802 being connected to central processor 801 . The storage unit 802 can store various data, and can further store programs for data processing. An instruction can be given to the terminal device based on the signaling.

In one implementation, the functionality of device 600 of Example 4 can be integrated into central processor 801 of terminal device 800 . Among them, the central processor 801 can be configured to implement the method described in the first or second embodiment.

For example, the central processor 801 may be configured to control and cause the terminal device 800 to perform the method of the first or second embodiment.

Further, since the first or second embodiment can be referred to for other setting methods of the central processor 801, detailed description thereof will be omitted here.

In another implementation, the device 600 described above may be arranged separately from the central processor 801, for example, the device 600 may be configured as a chip connected to the central processor 801 and the unit shown in FIG. Thus, the functions of the device 400 may be implemented under the control of the central processor 801 .

Moreover, as shown in FIG. 8, the terminal device 800 may further include a communication module 803, an input unit 804, a display 806, an audio processor 805, an antenna 807, a power supply 808, and the like.

Because this embodiment allows the terminal device to monitor the physical downlink control channel (PDCCH) for scheduling the first random access response (i.e. MsgB) in the two-step random access procedure for network device transmission in a specific time window. , to avoid confusion of random access responses for different PRACH ROs.

This embodiment 7 provides a network device, the principle of which the device solves the problem is similar to the method of embodiment 3, so please refer to the implementation of the method of embodiment 3 for its specific implementation. , and duplicate explanations with the same content are omitted here.

FIG. 9 is a configuration diagram of a network device according to an embodiment of the present invention. As shown in FIG. 9, a network device 900 may include a central processor (CPU) 901 and a memory 902 , the memory 902 being connected to the central processor 901 . Among them, the memory 902 can store various data, further store programs for data processing, and execute the programs under the control of the central processor 901 .

In one implementation, the functionality of apparatus 700 of Example 5 can be integrated into central processor 901 . Among them, the central processor 901 can be configured to implement the method described in the third embodiment.

For example, the central processor 901 may be configured to control and cause the network device 900 to perform the method of the third embodiment.

In addition, the third embodiment can be referred to for another layout method of the central processor 901, and the detailed description thereof will be omitted here.

In another implementation, the device 700 described above may be arranged separately from the central processor 901, for example, the device 700 may be configured as a chip connected to the central processor 901 and the unit shown in FIG. Thus, the functions of the device 700 may be implemented under the control of the central processor 901 .

Also, as shown in FIG. 9, the network device 900 may further include a transceiver 903, an antenna 904, a display, an audio processor, a power supply, and the like. Since the functions of these components are the same as those of the prior art, detailed description thereof will be omitted here. Note that network device 900 need not include all of the components shown in FIG. In addition, the network device 900 may further include components not shown in FIG. 9, which can be referred to prior art.

The eighth embodiment provides a communication system, which includes at least the network device 900 of the seventh embodiment and the terminal device 800 of the sixth embodiment. The contents of Embodiment 7 and Embodiment 6 are merged here, and the detailed description thereof is omitted here.

An embodiment of the present invention further provides a storage medium storing a computer readable program, in which the computer readable program is stored in a random access response receiving device or terminal device to generate the random access response according to the first or second embodiment. Execute the receive method.

An embodiment of the present invention further provides a computer readable program, wherein the program is executed in the random access response receiving device or terminal device when the program is executed in the random access response receiving device or terminal device. Execute the random access response receiving method described in Example 1 or 2.

An embodiment of the present invention further provides a storage medium storing a computer readable program, in which the computer readable program is stored in a random access response transmission device or network device to perform the random access response transmission method according to embodiment 3. to run.

An embodiment of the present invention further provides a computer-readable program, wherein the program is executed in the random access response transmission device or network device when the program is executed in the random access response transmission device or network device. The random access response transmission method described in Example 3 is executed.

In addition, the apparatus and methods described above may be implemented by software or hardware, or by a combination of hardware and software. The present invention further relates to a computer readable program as follows, which, when executed by a logic component, causes the logic component to implement the device or component described above, or implement the various methods or steps described above. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, a processor used in a computer, or the like. The present invention also relates to a storage medium storing the above program, such as a hard disk, magnetic disk, optical hard disk, DVD, flash memory, and the like.

Further, one or more combinations of the functional blocks described in the figures and/or one or more combinations of the functional blocks may be a general purpose processor, digital signal processing processor, etc. to perform the functions described herein. (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic component, discrete gate or transistor logic component, discrete hardware assembly or any other suitable combination It may be realized. Also, one or more combinations of the functional blocks and/or one or more combinations of the functional blocks described in the drawings may also be combined with computing devices, e.g., DSP and microprocessor combinations, multiple microprocessors. It may be configured as a processor, one or more microprocessors communicatively coupled with a DSP, or any other combination of components.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and all modifications to the present invention fall within the technical scope of the present invention as long as they do not depart from the spirit of the present invention.

In addition, the following additional remarks are disclosed regarding the above-described embodiments and the like.

(Appendix 1)
A method for receiving a random access response applied to a terminal device, comprising:
sending a first message (MsgA) of a two-step random access procedure to a network device, said first message (MsgA) including a preamble and physical uplink shared channel (PUSCH) data; monitoring a physical downlink control channel (PDCCH) for scheduling a first random access response (MsgB) in a two-step random access procedure transmitted by the network device within one random access response reception time window, and the first random access response; MsgB includes at least a C-RNTI to allocate for the terminal and a contention resolution message.

(Appendix 2)
The method of Appendix 1,
a physical downlink control channel (PDCCH) for scheduling the first random access response is scrambled with a random access radio network temporary indicator (RA-RNTI);
The method, wherein the length of the first random access response reception time window is less than or equal to the calculated window length of the random access radio network temporary indicator (RA-RNTI).

(Appendix 3)
The method of Supplementary Note 1, further comprising:
the terminal device monitors a physical downlink control channel (PDCCH) for scheduling a second random access response (Msg2) transmitted by the network device within the first random access response reception time window, and the second random access response Msg2; includes at least a TC-RNTI to allocate for the terminal and an uplink resource grant for the terminal to transmit Msg3 of a 4-step random access procedure.

(Appendix 4)
The method according to Appendix 3,
The start time of the first random access response reception time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
1st PDCCH opportunity to schedule the first random access response or the second random access response after transmitting the preamble of the first message; or physical uplink of the first message A method comprising a first PDCCH occasion on which said first random access response or said second random access response may be scheduled after transmitting a link shared channel (PUSCH).

(Appendix 5)
The method according to Appendix 3,
a physical downlink control channel (PDCCH) for scheduling the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
A physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI),
The method, wherein the length of the first random access response reception time window is less than or equal to the calculated window length of the first RA-RNTI and the calculated window length of the second RA-RNTI.

(Appendix 6)
The method according to Appendix 5,
The method, wherein the calculation window length of the second RA-RNTI is less than or equal to the calculation window length of the first RA-RNTI.

(Appendix 7)
The method according to Appendix 3,
When the terminal device receives the first random access response or the second random access response within the first random access response reception time window, the physical downlink control channel (PDCCH) of the first random access response and the second A method of stopping monitoring a physical downlink control channel (PDCCH) for random access responses.

(Appendix 8)
The method of Supplementary Note 1, further comprising:
After sending the first message MsgA of the two-step random access procedure to the network device,
The terminal device monitors a physical downlink control channel (PDCCH) for scheduling a second random access response transmitted by the network device within a second random access response reception time window, and the second random access response Msg2 is at least: TC-RNTI allocated for the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure;
A method, wherein at least one of a start time and an end time of said second random access response reception time window is different than said first random access response reception time window.

(Appendix 9)
The method of Appendix 8,
The start time of the first random access response reception time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occasion that can be used to schedule the first random access response after transmitting the preamble of the first message; or a physical uplink shared channel of the first message. a PDCCH occasion that may be used to schedule the first random access response after transmitting (PUSCH) data.

(Appendix 10)
The method of Appendix 8,
The start time of the second random access response reception time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occurrence after transmitting the preamble of the first message, which may be used to schedule the second random access response; or a physical uplink shared channel of the first message. a PDCCH occasion that may be used to schedule the second random access response, first after transmitting (PUSCH) data.

(Appendix 11)
The method of Appendix 8,
a physical downlink control channel (PDCCH) for scheduling the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The length of the first random access response reception time window is less than or equal to the calculation window length of the first RA-RNTI, and the length of the second random access response reception time window is the calculation window length of the second RA-RNTI. Below is the method.

(Appendix 12)
The method of Appendix 8,
When the terminal device receives the second random access response within the second random access response reception time window,
stopping monitoring the physical downlink control channel (PDCCH) for the second random access response and stopping or not starting monitoring the physical downlink control channel (PDCCH) for the first random access response.

(Appendix 13)
The method of Appendix 8,
When the terminal device receives the first random access response within the first random access response reception time window,
stopping monitoring the physical downlink control channel (PDCCH) for the first random access response and stopping or not starting monitoring the physical downlink control channel (PDCCH) for the second random access response.

(Appendix 14)
The method of Appendix 1,
the first random access response reception time window includes a first sub-time window and a second sub-time window;
the terminal device monitors a physical downlink control channel (PDCCH) for scheduling the first part of the first random access response within the first sub-time window;
the terminal device monitors a physical downlink control channel (PDCCH) for scheduling the second part of the first random access response within the second sub-time window;
The method, wherein the first part includes at least a C-RNTI to allocate for the terminal, and the second part includes at least the contention resolution message.

(Appendix 15)
15. The method of Appendix 14, further comprising:
The terminal monitors a physical downlink control channel (PDCCH) for scheduling a second random access response within the first sub-time window, and the second random access response Msg2 is at least a TC- allocated for the terminal. comprising an RNTI and an uplink resource grant for the terminal device to send Msg3 of a 4-step random access procedure.

(Appendix 16)
15. The method of Appendix 15,
The start time of the first sub-time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
a PDCCH occasion that may be used to schedule the first part of the first random access response or the second random access response, the first after transmitting the preamble of the first message; or The first PDCCH opportunity that can be used to schedule the first part of the first random access response or the second random access response after transmitting the physical uplink shared channel (PUSCH) data of the first message ( PDCCH occurrence).

(Appendix 17)
15. The method of Appendix 15,
a physical downlink control channel (PDCCH) for scheduling the first part of the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
A physical downlink control channel (PDCCH) for scheduling the second part of the first random access response MsgB is scrambled by the C-RNTI;
The method, wherein the length of the first sub-time window is less than or equal to the calculated window length of the first RA-RNTI and the calculated window length of the second RA-RNTI.

(Appendix 18)
17. The method of Appendix 17,
The method, wherein the calculation window length of the second RA-RNTI is less than or equal to the calculation window length of the first RA-RNTI.

(Appendix 19)
15. The method of Appendix 15,
The method, wherein the start time of the second sub-time window comprises a predetermined time after the terminal receives the first portion within the first sub-time window.

(Appendix 20)
15. The method of Appendix 15,
When the terminal device receives the first part or the second random access response within the first sub-time window, a physical downlink control channel (PDCCH) of the first part and a physical downlink control channel of the second random access response A method of stopping monitoring (PDCCH).

(Appendix 21)
15. The method of Appendix 14, further comprising:
After sending the first message MsgA of the two-step random access procedure to the network device,
The terminal device monitors a physical downlink control channel (PDCCH) for scheduling a second random access response transmitted by the network device within a second random access response reception time window, and the second random access response Msg2 is at least: including a TC-RNTI to allocate for the terminal and an uplink resource grant for the terminal to transmit Msg3 of a 4-step random access procedure;
The method, wherein at least one of a start time and an end time of said second random access response reception time window is different than said first sub-time window.

(Appendix 22)
The method according to Appendix 21,
The start time of the first sub-time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occurrence after transmitting the preamble of the first message, which may be used to schedule the first part; or a physical uplink shared channel (PUSCH) of the first message. A method comprising a first PDCCH occurrence that may be used to schedule the first portion after transmitting data.

(Appendix 23)
The method according to Appendix 21,
The start time of the second random access response reception time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occurrence after transmitting the preamble of the first message, which may be used to schedule the second random access response; or a physical uplink shared channel of the first message. a PDCCH occasion that may be used to schedule the second random access response, first after transmitting (PUSCH) data.

(Appendix 24)
The method according to Appendix 21,
a physical downlink control channel (PDCCH) scheduling the first part is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The length of the first sub-time window is less than or equal to the calculation window length of the first RA-RNTI, and the length of the second random access response reception time window is less than or equal to the calculation window length of the second RA-RNTI. ,Method.

(Appendix 25)
The method according to Appendix 21,
The method, wherein the starting time of the second sub-time window comprises a predetermined time after the terminal receives the first part of the first random access response within the first sub-time window.

(Appendix 26)
The method according to Appendix 21,
When the terminal device receives the second random access response within the second random access response reception time window,
stopping monitoring the physical downlink control channel (PDCCH) for the second random access response and stopping or not starting monitoring the physical downlink control channel (PDCCH) for the first part.

(Appendix 27)
The method according to Appendix 21,
if the terminal device receives the first part of the first random access response within the first sub-time window,
stopping monitoring the physical downlink control channel (PDCCH) for the first part and stopping or not starting monitoring the physical downlink control channel (PDCCH) for the second random access response.

(Appendix 28)
A random access response transmission method applied to a network device, comprising:
the network device sending an indication message for indicating the length of the first random access response reception time window to the terminal device;
The first random access response reception time window is used by the terminal device to monitor a physical downlink control channel (PDCCH) for scheduling a first random access response in a two-step random access procedure, and the first random access response is The method, wherein MsgB includes at least a C-RNTI to allocate for the terminal and a contention resolution message.

(Appendix 29)
29. The method of Appendix 28,
The method, wherein said indication message indicates a length of said first random access response reception time window.

(Appendix 30)
29. The method of Appendix 28,
a physical downlink control channel (PDCCH) for scheduling the first random access response is scrambled with a random access radio network temporary indicator (RA-RNTI);
The method, wherein the length of the first random access response reception time window is less than or equal to the calculated window length of the random access radio network temporary indicator (RA-RNTI).

(Appendix 31)
29. The method of Appendix 28,
The first random access response reception time window is further used by the terminal device to monitor a second random access response Msg2, the second random access response Msg2 being at least a TC-RNTI allocated for the terminal device. , and an uplink resource grant for the terminal device to send Msg3 of a 4-step random access procedure.

(Appendix 32)
31. The method of Appendix 31,
a physical downlink control channel (PDCCH) for scheduling the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The method, wherein the length of the first random access response reception time window is less than or equal to the calculated window length of the first RA-RNTI and the calculated window length of the second RA-RNTI.

(Appendix 33)
29. The method of Supplementary Note 28, further comprising:
The network device sends an indication message for indicating a length of a second random access response reception time window to the terminal device, and the second random access response reception time window is determined by the terminal device receiving a second random access response. The second random access response Msg2 is at least a TC-RNTI allocated for the terminal device, and the terminal device is a four-step random access procedure Including including an uplink resource grant for sending Msg3,
A method, wherein at least one of a start time and an end time of said second random access response reception time window is different than said first random access response reception time window.

(Appendix 34)
33. The method of Appendix 33,
a physical downlink control channel (PDCCH) for scheduling the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The length of the first random access response reception time window is less than or equal to the calculation window length of the first RA-RNTI, and the length of the second random access response reception time window is the calculation window length of the second RA-RNTI. Below is the method.

(Appendix 35)
29. The method of Appendix 28,
the first random access response reception time window includes a first sub-time window and a second sub-time window;
The first sub-time window is used for monitoring a physical downlink control channel (PDCCH) on which the terminal device schedules the first part of the first random access response,
The second sub-time window is used by the terminal device to monitor a physical downlink control channel (PDCCH) for scheduling the second part of the first random access response,
the first part includes at least a C-RNTI to allocate for the terminal device, and the second part includes at least a contention resolution message;
The method, wherein the indication message indicates the length of the first sub-time window and/or the length of the second sub-time window of the first random access response reception time window.

(Appendix 36)
35. The method of Appendix 35,
The first sub-time window is further used to monitor a physical downlink control channel (PDCCH) on which the terminal equipment schedules a second random access response, and the second random access response Msg2 is at least and an uplink resource grant for the terminal device to send Msg3 of the 4-step random access procedure.

(Appendix 37)
36. The method of Appendix 36,
a physical downlink control channel (PDCCH) for scheduling the first part of the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
A physical downlink control channel (PDCCH) for scheduling the second part of the first random access response MsgB is scrambled by the C-RNTI;
The method, wherein the length of the first sub-time window is less than or equal to the calculated window length of the first RA-RNTI and the calculated window length of the second RA-RNTI.

(Appendix 1a)
A random access response receiving device installed in a terminal device,
A first transmission unit for transmitting a first message (MsgA) of a two-step random access procedure to a network device, said first message (MsgA) comprising a preamble and physical uplink shared channel (PUSCH) data. , a first transmission unit; and monitoring a physical downlink control channel (PDCCH) for scheduling a first random access response (MsgB) in a two-step random access procedure for said network device transmission within a first random access response reception time window. , wherein the first random access response MsgB comprises at least a C-RNTI to allocate for the terminal device and a contention resolution message.

(Appendix 2a)
A device according to Appendix 1a,
a physical downlink control channel (PDCCH) for scheduling the first random access response is scrambled with a random access radio network temporary indicator (RA-RNTI);
The apparatus, wherein the length of the first random access response reception time window is less than or equal to the calculated window length of the random access radio network temporary indicator (RA-RNTI).

(Appendix 3a)
A device according to Appendix 1a,
After sending the first message MsgA of the two-step random access procedure to the network device,
The first monitoring unit monitors a physical downlink control channel (PDCCH) for scheduling a second random access response of the network device transmission within a second random access response reception time window, and the second random access response Msg2 includes at least a TC-RNTI to allocate for the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure;
An apparatus, wherein at least one of a start time and an end time of said second random access response reception time window is different than said first random access response reception time window.

(Appendix 4a)
The apparatus of clause 3a, wherein
The start time of the first random access response reception time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occurrence that can be used to schedule the first random access response after transmitting the preamble of the first message; or a physical uplink shared channel of the first message. An apparatus comprising a PDCCH occasion that may be used to schedule the first random access response, the first after transmitting (PUSCH) data.

(Appendix 5a)
The apparatus of clause 3a, wherein
The start time of the second random access response reception time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occurrence after transmitting the preamble of the first message, which may be used to schedule the second random access response; or a physical uplink shared channel of the first message. An apparatus comprising a PDCCH occasion that may be used to schedule the second random access response, first after transmitting (PUSCH) data.

(Appendix 6a)
A device according to Appendix 1a,
the first random access response reception time window includes a first sub-time window and a second sub-time window;
monitoring a physical downlink control channel (PDCCH) for scheduling a first part of the first random access response within the first sub-time window in the first monitoring unit;
monitoring a physical downlink control channel (PDCCH) for scheduling a second part of the first random access response within the second sub-time window in the first monitoring unit;
The apparatus, wherein the first part includes at least a C-RNTI to allocate for the terminal, and the second part includes at least the contention resolution message.

(Appendix 7a)
The apparatus of clause 6a, wherein
The first monitoring unit further monitors a physical downlink control channel (PDCCH) for scheduling a second random access response within the first sub-time window, wherein the second random access response Msg2 is at least the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure.

(Appendix 8a)
The apparatus of clause 7a, wherein
The start time of the first sub-time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
a PDCCH occasion that may be used to schedule the first part of the first random access response or the second random access response, the first after transmitting the preamble of the first message; or The first PDCCH opportunity that can be used to schedule the first part of the first random access response or the second random access response after transmitting the physical uplink shared channel (PUSCH) data of the first message ( PDCCH occurrence).

(Appendix 9a)
The apparatus of clause 7a, wherein
a physical downlink control channel (PDCCH) for scheduling the first part of the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
A physical downlink control channel (PDCCH) for scheduling the second part of the first random access response MsgB is scrambled by the C-RNTI;
The apparatus, wherein the length of the first sub-time window is less than or equal to the calculated window length of the first RA-RNTI and the calculated window length of the second RA-RNTI.

(Appendix 10a)
The apparatus of clause 9a, wherein
The apparatus, wherein the calculation window length of the second RA-RNTI is less than or equal to the calculation window length of the first RA-RNTI.

(Appendix 11a)
The apparatus of clause 7a, wherein
The apparatus, wherein the start time of the second sub-time window comprises a predetermined time after the first monitoring unit receives the first portion within the first sub-time window.

(Appendix 12a)
The apparatus of clause 6a, wherein
After sending the first message MsgA of the two-step random access procedure to the network device,
The first monitoring unit monitors a physical downlink control channel (PDCCH) for scheduling a second random access response of the network device transmission within a second random access response reception time window, and the second random access response Msg2 includes at least a TC-RNTI to allocate for the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure;
The apparatus, wherein at least one of a start time and an end time of said second random access response reception time window is different than said first sub-time window.

(Appendix 13a)
The apparatus of clause 12a, wherein
The start time of the first sub-time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occurrence after transmitting the preamble of the first message, which may be used to schedule the first part; or a physical uplink shared channel (PUSCH) of the first message. An apparatus comprising a PDCCH occasion that may be used to schedule the first portion, first after transmitting data.

(Appendix 14a)
The apparatus of clause 12a, wherein
The start time of the second random access response reception time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occurrence after transmitting the preamble of the first message, which may be used to schedule the second random access response; or a physical uplink shared channel of the first message. An apparatus comprising a PDCCH occasion that may be used to schedule the second random access response, first after transmitting (PUSCH) data.

(Appendix 15a)
The apparatus of clause 12a, wherein
if the first monitoring unit receives the second random access response within the second random access response reception time window,
An apparatus that stops monitoring the physical downlink control channel (PDCCH) for the second random access response and stops or does not start monitoring the physical downlink control channel (PDCCH) for the first part.

(Appendix 16a)
The apparatus of clause 12a, wherein
if the first monitoring unit receives a first portion of a first random access response within the first sub-time window;
An apparatus that stops monitoring the physical downlink control channel (PDCCH) for the first portion and stops or does not start monitoring the physical downlink control channel (PDCCH) for the second random access response.

(Appendix 17a)
A random access response transmission device installed in a network device,
a second sending unit for sending an indication message for indicating the length of the first random access response reception time window to the terminal device;
The first random access response reception time window is used by the terminal device to monitor a physical downlink control channel (PDCCH) for scheduling a first random access response in a two-step random access procedure, and the first random access response is The apparatus, wherein MsgB includes at least a C-RNTI to allocate for the terminal and a contention resolution message.

(Appendix 18a)
17a. The device of clause 17a,
The apparatus, wherein said indication message indicates a length of said first random access response reception time window.

(Appendix 19a)
17a. The device of clause 17a,
a physical downlink control channel (PDCCH) for scheduling the first random access response is scrambled with a random access radio network temporary indicator (RA-RNTI);
The apparatus, wherein the length of the first random access response reception time window is less than or equal to the calculated window length of the random access radio network temporary indicator (RA-RNTI).

(Appendix 20a)
17a. The device of clause 17a,
The first random access response reception time window is further used by the terminal device to monitor a second random access response Msg2, the second random access response Msg2 being at least a TC-RNTI allocated for the terminal device. , and an uplink resource grant for the terminal device to send Msg3 of a 4-step random access procedure.

(Appendix 21a)
The apparatus of clause 20a, wherein
a physical downlink control channel (PDCCH) for scheduling the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The apparatus, wherein the length of the first random access response reception time window is less than or equal to the calculated window length of the first RA-RNTI and the calculated window length of the second RA-RNTI.

(Appendix 22a)
17a. The device of clause 17a,
The second sending unit further sends an indication message for indicating a length of a second random access response reception time window to the terminal device, the second random access response reception time window being the Used to monitor the physical downlink control channel (PDCCH) for scheduling two random access responses, the second random access response Msg2 is at least the TC-RNTI allocated for the terminal device, and the terminal device 4 steps Including an uplink resource grant for sending Msg3 of the random access procedure,
An apparatus, wherein at least one of a start time and an end time of said second random access response reception time window is different than said first random access response reception time window.

(Appendix 23a)
The apparatus of clause 22a, wherein
a physical downlink control channel (PDCCH) for scheduling the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The length of the first random access response reception time window is less than or equal to the calculation window length of the first RA-RNTI, and the length of the second random access response reception time window is the calculation window length of the second RA-RNTI. A device that is:

(Appendix 24a)
17a. The device of clause 17a,
the first random access response reception time window includes a first sub-time window and a second sub-time window;
The first sub-time window is used for monitoring a physical downlink control channel (PDCCH) on which the terminal device schedules the first part of the first random access response,
The second sub-time window is used by the terminal device to monitor a physical downlink control channel (PDCCH) for scheduling the second part of the first random access response,
the first part includes at least a C-RNTI to allocate for the terminal device, and the second part includes at least a contention resolution message;
The apparatus, wherein the indication message indicates the length of the first sub-time window and/or the length of the second sub-time window of the first random access response reception time window.

(Appendix 25a)
The apparatus of clause 24a, wherein
The first sub-time window is further used to monitor a physical downlink control channel (PDCCH) on which the terminal equipment schedules a second random access response, and the second random access response Msg2 is at least and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure.

(Appendix 26a)
The apparatus of clause 25a, wherein
a physical downlink control channel (PDCCH) for scheduling the first part of the first random access response MsgB is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
A physical downlink control channel (PDCCH) for scheduling the second part of the first random access response MsgB is scrambled by the C-RNTI;
The apparatus, wherein the length of the first sub-time window is less than or equal to the calculated window length of the first RA-RNTI and the calculated window length of the second RA-RNTI.

Claims (17)

A random access response receiving device used in a terminal device,
A first transmission unit for transmitting a first message (MsgA) of a two-step random access procedure to a network device, the first message (MsgA) including a preamble and physical uplink shared channel (PUSCH) data. , a first transmitting unit; and a first monitoring a physical downlink control channel (PDCCH) for scheduling a first random access response in a two-step random access procedure for said network device transmission within a first random access response receiving time window. a monitoring unit, wherein the first random access response includes at least a C-RNTI allocated for the terminal device and a contention resolution message ;
The first monitoring unit further monitors a physical downlink control channel (PDCCH) for scheduling a second random access response of the network device transmission within the first random access response reception time window; The random access response includes at least a TC-RNTI allocated for the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure;
When the first monitoring unit receives the first random access response or the second random access response within the first random access response reception time window, the physical downlink control channel (PDCCH) of the first random access response and A receiving device that stops monitoring the physical downlink control channel (PDCCH) for the second random access response . The receiving device according to claim 1 ,
The start time of the first random access response reception time window is
a predetermined time after the terminal device sends a preamble of a first message in a two-step random access procedure;
a predetermined time after the terminal device has transmitted the physical uplink shared channel (PUSCH) data of the first message in the two-step random access procedure;
A first PDCCH occasion that can be used to schedule the first random access response or the second random access response, the first after transmitting the preamble of the first message; or The second PDCCH occasion that can be used to schedule the first random access response or the second random access response after transmitting the physical uplink shared channel (PUSCH) of one message (PDCCH occasion) receiving device. The receiving device according to claim 1 ,
a physical downlink control channel (PDCCH) for scheduling the first random access response is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The receiving device, wherein the length of the first random access response reception time window is less than or equal to the calculation time window length of the first RA-RNTI and the calculation time window length of the second RA-RNTI. The receiving device according to claim 3 ,
The receiving device, wherein the calculation time window length of the second RA-RNTI is less than or equal to the calculation time window length of the first RA-RNTI. The receiving device according to claim 1,
After sending the first message MsgA of the two-step random access procedure to the network device,
The first monitoring unit monitors a physical downlink control channel (PDCCH) for scheduling a second random access response transmitted by the network device within a second random access response reception time window, the second random access response being At least a TC-RNTI allocated for the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure;
A receiving device, wherein the start time or end time of the second random access response reception time window is different from the first random access response reception time window. The receiving device according to claim 5 ,
a physical downlink control channel (PDCCH) for scheduling the first random access response is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The length of the first random access response reception time window is less than or equal to the calculation time window length of the first RA-RNTI, and the length of the second random access response reception time window is the calculation time of the second RA-RNTI. A receiver that is less than or equal to the window length . The receiving device according to claim 5 ,
The first monitoring unit stops monitoring a physical downlink control channel (PDCCH) for the second random access response when the second random access response is received within the second random access response reception time window, and A receiving device that stops or does not start monitoring the physical downlink control channel (PDCCH) for the first random access response. The receiving device according to claim 5 ,
if the first monitoring unit receives a first random access response within the first random access response reception time window, stop monitoring the physical downlink control channel (PDCCH) for the first random access response; A receiving device that stops or does not start monitoring a Physical Downlink Control Channel (PDCCH) for two random access responses. The receiving device according to claim 1,
the first random access response reception time window includes a first sub-time window and a second sub-time window;
the first monitoring unit monitors a physical downlink control channel (PDCCH) scheduling a first part of the first random access response within the first sub-time window;
the first monitoring unit monitors a physical downlink control channel (PDCCH) for scheduling a second part of the first random access response within the second sub-time window;
The receiving device, wherein the first part includes at least a C-RNTI assigned for the terminal, and the second part includes at least the contention resolution message. The receiving device according to claim 9 ,
The first monitoring unit further monitors a physical downlink control channel (PDCCH) for scheduling a second random access response within the first sub-time window, the second random access response at least for the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of the 4-step random access procedure. The receiving device according to claim 10 ,
a physical downlink control channel (PDCCH) for scheduling a first part of the first random access response is scrambled with the first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response is scrambled with the second random access radio network temporary indicator (RA-RNTI);
A physical downlink control channel (PDCCH) for scheduling the second part of the first random access response is scrambled by the C-RNTI;
The receiving device, wherein the length of the first sub-time window is equal to or less than the calculated time window length of the first RA-RNTI and the calculated time window length of the second RA-RNTI. The receiving device according to claim 10 ,
When the first monitoring unit receives the first part or the second random access response within the first sub-time window, the physical downlink control channel (PDCCH) of the first part and the physical downlink control channel (PDCCH) of the second random access response A receiver that stops monitoring a downlink control channel (PDCCH). The receiving device according to claim 9 ,
After sending the first message MsgA of the two-step random access procedure to the network device,
The first monitoring unit monitors a physical downlink control channel (PDCCH) for scheduling a second random access response transmitted by the network device within a second random access response reception time window, the second random access response being At least a TC-RNTI allocated for the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure;
A receiving device, wherein the start time or end time of the second random access response reception time window is different from the first sub-time window. The receiving device according to claim 1-3 ,
a physical downlink control channel (PDCCH) scheduling the first part is scrambled with a first random access radio network temporary indicator (RA-RNTI);
a physical downlink control channel (PDCCH) for scheduling the second random access response Msg2 is scrambled with a second random access radio network temporary indicator (RA-RNTI);
The length of the first sub-time window is less than or equal to the calculated time window length of the first RA-RNTI, and the length of the second random access response reception time window is less than or equal to the calculated time window length of the second RA-RNTI. is a receiving device. The receiving device according to claim 14 ,
The receiving device, wherein the start time of the second sub-time window comprises a predetermined time after the first monitoring unit receives the first part of the first random access response within the first sub-time window. A random access response transmitter used in a network device,
a second sending unit for sending an indication message for indicating the length of the first random access response reception time window to the terminal device;
The first random access response reception time window is used by the terminal device to monitor a physical downlink control channel (PDCCH) for scheduling a first random access response in a two-step random access procedure, and the first random access response is includes at least a C-RNTI assigned for said terminal and a contention resolution message;
The terminal device further monitors a physical downlink control channel (PDCCH) for scheduling a second random access response transmitted by the network device within the first random access response reception time window, and the second random access The response includes at least a TC-RNTI allocated for the terminal device and an uplink resource grant for the terminal device to transmit Msg3 of a 4-step random access procedure;
When the terminal device receives the first random access response or the second random access response within the first random access response reception time window, the physical downlink control channel (PDCCH) of the first random access response and the second 2. A transmitting device that stops monitoring a physical downlink control channel (PDCCH) for random access responses . A communication system including a network device and a terminal device,
The terminal device comprises a random access response receiving device according to any one of claims 1-15 ,
A communication system, wherein the network device comprises a random access response transmitting device according to claim 16 .

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